I have no Thinkpad, but reasons for not working could be Guix’ ModemManager being slightly out of date or the WWAN card requiring non-free firmware. I do not like what I see on
https://h-node.org/notebooks/view/en/1440/ThinkPad-X201--3680-WZQ- Other than that, what works on other GNU systems should work on Guix System. Regards, Florian
